SQL Query with Multiple Possible Tables and an Exclusion Table - sql

Question

I have multiple possible data tables (created to support parallel processing) to search against to find a match, and another table containing entries to exclude. The tables are defined as follows, along with some example data:
CREATE TABLE HOUSEHOLD_1
(
PERSON_ID NUMBER NOT NULL ENABLE,
HOUSEHOLD_HEAD_ID NUMBER NOT NULL ENABLE,
RELATIONSHIP CHAR (1) NOT NULL ENABLE,
CONSTRAINT HOUSEHOLD_1_PK PRIMARY KEY (PERSON_ID, HOUSEHOLD_HEAD_ID, RELATIONSHIP) ENABLE
);
INSERT INTO HOUSEHOLD_1 VALUES (1, 1, 'H');
INSERT INTO HOUSEHOLD_1 VALUES (2, 1, 'S');
INSERT INTO HOUSEHOLD_1 VALUES (3, 1, 'D');
CREATE TABLE HOUSEHOLD_2
(
PERSON_ID NUMBER NOT NULL ENABLE,
HOUSEHOLD_HEAD_ID NUMBER NOT NULL ENABLE,
RELATIONSHIP CHAR (1) NOT NULL ENABLE,
CONSTRAINT HOUSEHOLD_2_PK PRIMARY KEY (PERSON_ID, HOUSEHOLD_HEAD_ID, RELATIONSHIP) ENABLE
);
INSERT INTO HOUSEHOLD_2 VALUES (4, 4, 'H');
INSERT INTO HOUSEHOLD_2 VALUES (5, 4, 'S');
INSERT INTO HOUSEHOLD_2 VALUES (6, 4, 'D');
CREATE TABLE HOUSEHOLD_3
(
PERSON_ID NUMBER NOT NULL ENABLE,
HOUSEHOLD_HEAD_ID NUMBER NOT NULL ENABLE,
RELATIONSHIP CHAR (1) NOT NULL ENABLE,
CONSTRAINT HOUSEHOLD_3_PK PRIMARY KEY (PERSON_ID, HOUSEHOLD_HEAD_ID, RELATIONSHIP) ENABLE
);
INSERT INTO HOUSEHOLD_3 VALUES (7, 7, 'H');
INSERT INTO HOUSEHOLD_3 VALUES (8, 7, 'S');
INSERT INTO HOUSEHOLD_3 VALUES (9, 7, 'D');
CREATE TABLE HOUSEHOLD_DELETIONS
(
PERSON_ID NUMBER NOT NULL ENABLE,
HOUSEHOLD_HEAD_ID NUMBER NOT NULL ENABLE,
RELATIONSHIP CHAR (1) NOT NULL ENABLE,
CONSTRAINT HOUSEHOLD_DELETIONS_PK PRIMARY KEY (PERSON_ID, HOUSEHOLD_HEAD_ID, RELATIONSHIP) ENABLE
);
INSERT INTO HOUSEHOLD_DELETIONS VALUES (9, 7, 'D');
CREATE TABLE CLOSED_ACCOUNTS
(
PERSON_ID NUMBER NOT NULL ENABLE,
CONSTRAINT CLOSED_ACCOUNTS_PK PRIMARY KEY (PERSON_ID) ENABLE
);
INSERT INTO CLOSED_ACCOUNTS VALUES (3);
INSERT INTO CLOSED_ACCOUNTS VALUES (6);
INSERT INTO CLOSED_ACCOUNTS VALUES (9);
INSERT INTO CLOSED_ACCOUNTS VALUES (10);
I need to find the PERSON_ID values in CLOSED_ACCOUNTS that have a matching PERSON_ID in either HOUSEHOLD_1, HOUSEHOLD_2, or HOUSEHOLD_3, but do not have a PERSON_ID in HOUSEHOLD_DELETIONS. With the data above, I should only find PERSON_ID values 3 and 6. I've tried the SQL tricks I know, but I have not been successful, so any assistance would be appreciated. Thanks in advance.

Answer 1

SET operations should work to you:
SQL> select person_id from CLOSED_ACCOUNTS
2 intersect (
3 select person_id from HOUSEHOLD_1
4 union
5 select person_id from HOUSEHOLD_2
6 union
7 select person_id from HOUSEHOLD_3
8 )
9 minus
10 select person_id from HOUSEHOLD_DELETIONS
11 /
PERSON_ID
----------
3
6